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Jeroen ter Heerdt

PROFILE

Jeroen Ter Heerdt

Over eleven months, J. Terhune enhanced the MicrosoftDocs/powerbi-docs repository by delivering 38 documentation features and resolving 10 bugs, focusing on Power BI, DAX, and data modeling. Terhune clarified complex behaviors such as context clearing in time intelligence functions and sorting logic in visuals, using DAX and Power Query M to ensure technical accuracy. Their work included cross-repository collaboration, accessibility improvements, and the integration of new features like visual calculations and calculation groups. By refining documentation structure, updating training resources, and addressing user feedback, Terhune improved onboarding, reduced support inquiries, and ensured the documentation accurately reflected evolving product capabilities.

Overall Statistics

Feature vs Bugs

79%Features

Repository Contributions

104Total
Bugs
10
Commits
104
Features
38
Lines of code
1,832
Activity Months11

Work History

September 2025

1 Commits • 1 Features

Sep 1, 2025

September 2025 monthly summary for MicrosoftDocs/powerbi-docs: Focused on improving user guidance around Sorting Visuals. Introduced a dedicated 'Considerations' section clarifying how sort order behaves when a column being sorted by another column is also a key column, helping users avoid unexpected sorting results.

August 2025

1 Commits • 1 Features

Aug 1, 2025

Monthly summary for 2025-08 focused on the MicrosoftDocs/powerbi-docs repository. Key feature delivered: a documentation update clarifying context clearing behavior for Power BI time intelligence functions, specifying that context clearing applies to calendar-tagged columns and their associated sort-by columns. This work is anchored to commit 42da7a4a7ddbf042f3c377986afb6c759086a4c2 and reflects feedback from the contributor."

July 2025

25 Commits • 13 Features

Jul 1, 2025

July 2025 performance summary for MicrosoftDocs/powerbi-docs focusing on delivering cross-component validation improvements, guidance consolidation, and accessibility enhancements, with strong reviewer collaboration and UX refinements.

June 2025

37 Commits • 9 Features

Jun 1, 2025

June 2025: Delivered major enhancements to Visual Calculations, stabilized live-connection workflows, expanded DAX/docs quality, and laid groundwork for Custom Calendars and Time Intelligence. Across MicrosoftDocs/powerbi-docs and MicrosoftDocs/query-docs, the team shipped feature work, fixed critical issues, and improved documentation to accelerate onboarding and reduce support overhead. Notable contributions include SU06/SU07 visual calculation updates, a live-connection limitation fix, extensive parameter picker and documentation improvements, and early drafts for custom calendars and time intelligence, as well as comprehensive DAX documentation improvements for query docs.

May 2025

5 Commits • 3 Features

May 1, 2025

May 2025 – Focused documentation improvements for Power BI docs to reflect recent feature updates and accessibility enhancements. Key areas include sparklines and calculation group integration, treemap visual calculations, and image accessibility. Updates aligned with product changes (matrix column limit increased to 25) and expanded user-facing functionality, enabling clearer guidance for developers and analysts.

April 2025

15 Commits • 4 Features

Apr 1, 2025

April 2025 monthly doc sprint delivered targeted updates across three repositories, focusing on feature documentation and accurate guidance for new calculation features. Key items include: Power BI Visual Calculations Documentation: Reset parameter docs updated with absolute/relative modes, examples, and comprehensive behavior coverage; Power BI Documentation: Calculation Groups, Field Parameters, and related features updated to cover LOOKUP/LOOKUPWITHTOTALS, selection expressions in calc groups, and field parameter behavior/ordering; DAX Window Functions Documentation Update: Removed axis as a separate parameter and clarified semantics under relation parameter; Calculation Groups Documentation Enhancements and Clarifications: Consolidated updates to selectionExpressionBehavior options and formatting for readability. In addition, multiple quality fixes across repos (typo corrections, formatting improvements, and review responses) to improve accuracy and readability. The overall impact: improved developer and partner onboarding, reduced ambiguity, and alignment with product changes, enabling faster adoption and fewer follow-up support requests. Technologies/skills demonstrated: documentation engineering, familiarity with DAX concepts (reset parameter, selection expressions, calculation groups, field parameters), cross-repo collaboration, and documentation formatting standards.

March 2025

2 Commits

Mar 1, 2025

March 2025 monthly summary for MicrosoftDocs/powerbi-docs: Focused on improving documentation reliability and user navigation by fixing broken DAX function links and ensuring references point to the correct official pages for CROSSFILTER and TREATAS. The effort enhances self-service learning and reduces support friction by ensuring users land on accurate resources.

February 2025

5 Commits • 2 Features

Feb 1, 2025

February 2025 monthly summary: Focused on tightening the guidance around DAX data types, Variant handling, and calculation groups across two MicrosoftDocs repositories. Delivered two feature-rich documentation updates that clarify how calculation groups interact with measure data types (Variant behavior when calc groups are applied, and revert when removed), and consolidated DAX data type guidance with explicit notes on Variant usage and Text size limits. Implemented review-driven wording corrections to ensure consistency and accuracy across documentation. These changes enhance developer understanding, reduce ambiguity in complex DAX scenarios, and improve onboarding for analysts integrating SSAS tabular models with dynamic calculation groups.

January 2025

5 Commits • 2 Features

Jan 1, 2025

January 2025 monthly summary for development work across two Microsoft Docs repositories. Focused on improving documentation quality, clarity, and discoverability for DAX and Power BI features, with particular emphasis on window function behavior and value-filter limitations. Delivered cross-repo documentation improvements and addressed an identified documentation typo to enhance accuracy and user trust. Resulted in clearer guidance for users, reduced potential support inquiries, and reinforced engineering practices around documentation.

November 2024

7 Commits • 2 Features

Nov 1, 2024

2024-11 Monthly summary for MicrosoftDocs/powerbi-docs: Delivered enhancements to Visual Calculations documentation and updated training resource links. The work improves user understanding, onboarding, and maintainability, directly supporting smoother adoption of visual calculation features in Power BI Desktop and clearer guidance for developers and analysts who rely on RUNNINGSUM, field references, and conditional formatting in visual calculations.

October 2024

1 Commits • 1 Features

Oct 1, 2024

2024-10 Monthly Summary for MicrosoftDocs/powerbi-docs: Delivered a focused documentation enhancement for CSV export behavior. Added a new bullet to clarify that subtotals and totals are not included when exporting to CSV, reducing user confusion, and aligning documentation with actual export behavior. This change was implemented via commit 50b00aa2d5633f172c2521ad3c63bf8748a533d9. Business impact includes improved user understanding, reduced potential support inquiries, and a smoother onboarding experience for Power BI CSV exports. Demonstrated skills in documentation, version control, and cross-functional collaboration with content teams.

Activity

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Quality Metrics

Correctness98.8%
Maintainability98.8%
Architecture98.4%
Performance98.0%
AI Usage20.0%

Skills & Technologies

Programming Languages

DAXMMarkdownPowerQuery MTMDLYAML

Technical Skills

Business IntelligenceContent ManagementDAXData AnalysisData ModelingDocumentationPower BIPower QueryTechnical Writingaccessibilitydocumentation

Repositories Contributed To

3 repos

Overview of all repositories you've contributed to across your timeline

MicrosoftDocs/powerbi-docs

Oct 2024 Sep 2025
10 Months active

Languages Used

MarkdownDAXMPowerQuery MTMDLYAML

Technical Skills

DocumentationTechnical WritingBusiness IntelligenceContent ManagementDAXData Modeling

MicrosoftDocs/query-docs

Jan 2025 Jun 2025
4 Months active

Languages Used

MarkdownDAX

Technical Skills

DocumentationDAXData AnalysisData ModelingTechnical Writing

MicrosoftDocs/bi-shared-docs

Feb 2025 Apr 2025
2 Months active

Languages Used

Markdown

Technical Skills

DocumentationTechnical Writing

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